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Nishanthhampali · #1 (**permalink**) 02-01-2008, 11:16 AM

Hello,
I have the XML file in the format

<Users>
<Host>
<hostAddress>180.144.226.47</hostAddress>
<userName>pwdfe</userName>
<password>hjitre</password>
<instanceCount>2</instanceCount>
</Host>
<Host>
<hostAddress>180.144.226.87</hostAddress>
<userName>trrrer</userName>
<password>jhjjhhj</password>
<instanceCount>3</instanceCount>
</Host>
<Host>
<hostAddress>180.455.226.87</hostAddress>
<userName>wewqw</userName>
<password>dfsdfd</password>
<instanceCount>3</instanceCount>
</Host>
</Users>

I have to read this xml file from the shell script and store the value of the tags hostAddress,username,password,instancecount in a separate arrays.

Please help me out in solving this.

agn · #2 (**permalink**) 02-11-2008, 01:31 PM

Code:

for tag in hostAddress username password instancecount
do
    grep  $tag in.xml | tr -d '\t' | sed 's/^<.*>\([^<].*\)<.*>$/\1/'
done

Something like the above might help. I don't use bash, so don't know how arrays are populated.

manishkochar · #3 (**permalink**) 02-13-2008, 08:55 PM

Quote:

Originally Posted by agn

Code:

for tag in hostAddress username password instancecount
do
    grep  $tag in.xml | tr -d '\t' | sed 's/^<.*>\([^<].*\)<.*>$/\1/'
done

Something like the above might help. I don't use bash, so don't know how arrays are populated.

The sed expression was the most complex part, stuffing things into an array, is easy

Code:

#!/bin/bash

for tag in hostAddress userName password instanceCount
do
OUT=`grep  $tag in.xml | tr -d '\t' | sed 's/^<.*>\([^<].*\)<.*>$/\1/' `

# This is what I call the eval_trick, difficult to explain in words.
eval ${tag}=`echo -ne \""${OUT}"\"`
done

# So let's stuff the obtained results into 4 different Arrays

H_ARRAY=( `echo ${hostAddress}` )
U_ARRAY=( `echo ${userName}` )
P_ARRAY=( `echo ${password}` )
I_ARRAY=( `echo ${instanceCount}` )

# Ok, time to announce success, let's printout each of the arrays

echo ${H_ARRAY[@]}
echo ${U_ARRAY[@]}
echo ${P_ARRAY[@]}
echo ${I_ARRAY[@]}

# For the benefit of agn - 
# We can now refer to each unique element of the array like this -

echo ${H_ARRAY[0]} 

# The above prints the first item in array H_ARRAY

I chanced upon this thread, because, I am trying to do a similar project.
The specs look rather challenging, for my poor knowledge of sed.
So let's see if agn can crack this one too!

I want to create a list of web-sites that definitely contain pornographic, or adult content, that's not suitable for kids, at school.
I can see that the dmoz offers it's data in an xml format.
I also noticed that the xml file contains descriptive information about each web-site.

Now this is what I want to do -
A shell script, wherein I specify (via PCRE, of course) the look_up_string.
Based on the look_up_string, I want to, collect in a file the names of web-sites. I don't want the whole URL, just the hostname is enough.
I will then later set this hostname in my hosts file, to ensure effective blocking of these sites.

Could anybody help on this?

agn · #4 (**permalink**) 02-13-2008, 09:42 PM

Am not an expert in sed. Sed is a really weird tool, but the power it contains is awesome.

Regex's are not a good tool to parse html/xml data. You should use an XML parser. Right tool for the right job.

manishkochar · #5 (**permalink**) 02-14-2008, 09:44 AM

Quote:

Originally Posted by agn

Am not an expert in sed. Sed is a really weird tool, but the power it contains is awesome.

Regex's are not a good tool to parse html/xml data. You should use an XML parser. Right tool for the right job.

Any links you would like to share?
I've tried everything listed in freshmeat / sourceforge for "dmoz" parsing.
Sadly, none of them really work, and all are poorly documented.
Besides I feel like a retard when it comes to perl.

agn · #6 (**permalink**) 02-14-2008, 11:57 AM

Am a total newbie to XML parsing. But, XML::Simple[1] looks easy.

[1] XML::Simple - Easy API to maintain XML (esp config file - search.cpan.org

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Parse XML file and store data in array in shell scripting

Parse XML file and store data in array in shell scripting

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